Hertel R859560-S Nptf Pipe Tap 1-11/2 5 Flute Hss

Product Description

The HERTEL R859560-S is a standard NPTF pipe tap designed for cutting tapered pipe threads in ferrous and non-ferrous materials. Ground from high speed steel (HSS) with a bright, uncoated finish, this tap produces 1-11/2 NPTF threads over a 1-3/4 inch thread length. The short projection design suits tight-clearance applications where tool reach must be minimized. With 5 flutes, the tap distributes cutting load evenly and handles chip evacuation in through and blind pipe thread applications. Licensed plumbers, pipefitters, and maintenance machinists use this tap when threading pipe fittings, manifolds, and hydraulic or pneumatic ports to NPTF standards.

This tap is suited for threading pipe connections in residential and commercial plumbing, HVAC refrigerant line fittings, hydraulic assemblies, and pneumatic system ports where a pressure-tight NPTF thread is required. The 1-11/2 thread size targets larger-diameter pipe connections. Short projection geometry makes it practical on drill press setups, tapping heads, or hand-tap drivers in confined spaces or on production fixtures.

Key Features

• NPTF thread form produces pressure-tight, dryseal pipe threads without sealant
• 5-flute design distributes cutting forces and supports chip evacuation
• High speed steel construction provides hardness and wear resistance across a range of workpiece materials
• Bright uncoated finish suits general-purpose tapping where coating is not required
• Short projection style fits tight-clearance and fixture-mounted tapping applications
• 1.1250 inch shank diameter with 0.8430 inch square drive for standard tap wrenches and holders

Compatibility

Designed for use in standard tap holders, tapping heads, and hand tap wrenches accepting a 1.1250 inch shank with a 0.8430 inch square drive. Suitable for threading 1-11/2 NPTF pipe threads in steel, cast iron, aluminum, brass, and similar machinable materials.

Installation Notes

Pipe tapping should be performed by a qualified machinist, pipefitter, or plumber following shop safety practices. Secure the workpiece firmly before tapping and use a cutting fluid appropriate for the workpiece material to extend tap life and improve thread finish. Back the tap off periodically to break chips and prevent tap breakage, especially in blind-hole applications. Always verify thread fit with a NPTF thread gauge before assembly on pressure-bearing systems.